Photographic film unit with taps on binding element

Abstract

A photographic film unit comprising superposed photosensitive and image-viewing elements including an area adapted to be exposed and processed by an aqueous alkaline processing composition spread in a layer between the two elements to facilitate formation of a transfer image. A trap for excess processing compositon is affixed to one end of the unit and the entire assemblage is secured together by a binding element which is secured around and to at least three edges of the film unit including the edge to which is affixed the trap. The binding element comprises foldable tabs on both sides of the trap area and, when the element is folded to provide binding functionality, the tabs are located slightly inboard of the trap whereby the thickness of the film unit in the area of a tab is increased by the thickness of the tab.

What is claimed is: 
     
       1. In a diffusion transfer photographic film unit adapted to be processed to form a visible image by moving the film unit between pressure applying members to distribute a processing composition from the leading end to the trailing end thereof, said film unit comprising: a photosensitive element;   an image receiving element in face to face relationship with said photosensitive element thereby forming an assembly having a leading and trailing end joined by lateral edges;   a quantity of processing composition releasably contained along the leading end of said assembly for distribution between said photosensitive and said image receiving elements in response to movement of said elements between a pair of pressure-applying members;   a trap having a leading and trailing edge affixed along the trailing end of said assembly for retaining excess processing composition; and   a binding element extending around at least the trailing end and lateral edges of the assembly and securing the photosensitive and image-receiving elements to one another in order to retain said sheets in superposition and prevent escape of processing composition from between the sheets wherein said binding element comprises an exposure aperture for exposing said photosensitive sheet therethrough, said exposure aperture comprising a leading and trailing edge;   the improvement which comprises two tabs integral with said binding element, each of which is folded immediately adjacent a lateral edge of said film at a point adjacent and inboard the leading edge of the trap; and   whereby an increase in thickness of the binder element of the film unit is achieved adjacent the leading edge of the trap.   
     
     
       2. The film unit of claim 1 wherein said tabs are folded between the leading edge of the trap and the trailing edge of said exposure aperture.